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Carbohydrate-Protein Coingestion Enhances Cycling Performance with Minimal Recovery Time between Bouts of Exhaustive Intermittent Exercise
Abstract
Introduction: The addition of protein to a carbohydrate solution has been shown to effectively stimulate glycogen synthesis in an acute setting and enhance exercise performance in a subsequent bout of exhaustive exercise. This study examined the effects of carbohydrate-protein (CHO-P), carbohydrate (CHO), and placebo (PLA) within a 2-hour recovery period on subsequent high-intensity exercise performance. Methods: This was a randomized, single-blind between-subject design. Participants (n = 25) were assigned to consume one of three beverages during a 2-hour recovery period: PLA, CHO (1.2 g/kg bm), or CHO-P (0.8 g/kg bm CHO + 0.4 g/kg bm PRO). During Visit#1, participants completed graded exercise testing (VO2peak; cycle ergometer). Familiarization (Visit#2) consisted of 5 x 4 min intervals at 70-80% of peak power output [PPO, watts] with two minutes of active recovery at 50W, followed by time to exhaustion [TTE] at 90% PPO. The same high-intensity interval protocol with TTE was conducted pre-and post-beverage consumption on Visit #3. Results: The ANCOVA indicated a significant difference among the group means for the posttest TTE (F2,21=8.248, p=.002, ƞ2=.440) and RER (F2,21=6.811, p=.005, ƞ2=.393) values after adjusting for the pretest differences. Conclusions: Carbohydrate-protein co-ingestion was effective in promoting an increase in TTE performance with limited time to recover.
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“In comparison, performance decreased by 14% and 31% with CHO (1.2 g/kg) and PLA (electrolytes and water), respectively [18].”
From Carbohydrate-Protein drink is effective for restoring endurance capacity in masters class athletes after a two-Hour recovery (2023) · cites this paper as [18]
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“In support, a recent investigation reported time to exhaustion performance increased by approximately 35% during the second bout of exercise in college-aged males and females following consumption of a CHO-P (0.8 g/kg and 0.4 g/kg) beverage and a 2-hr recovery period [18].”
From Carbohydrate-Protein drink is effective for restoring endurance capacity in masters class athletes after a two-Hour recovery (2023) · cites this paper as [18]
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“The calculation of sample size (G*Power 3.1.9.4, Dusseldorf, Germany) was based on pilot data in moderately trained young men and women (22.0 + 2.4 years) collected in our lab using the same protocol (90% PPO TTE) as outlined in this study [18]. The sample size was determined to be a total of 18 (6 in each group) based on a one-way ANCOVA, power of 0.80, and an alpha of 0.05.”
From Carbohydrate-Protein drink is effective for restoring endurance capacity in masters class athletes after a two-Hour recovery (2023) · cites this paper as [18]
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Cited by
Naderi, A., Rothschild, J. A., Santos, H. O., Hamidvand, A., Koozehchian, M. S., Ghazzagh, A., Berjisian, E., & Podlogar, T. (2025) · Sports Medicine · doi:10.1007/s40279-025-02213-6 · Cited by 77
“In addition, exercise capacity during high-intensity interval cycling was significantly greater with carbohydrate-protein co-ingestion (0.8 g·kg −1 ·h ⁻ 1 of carbohydrates and 0.4 g·kg −1 ·h ⁻ 1 of protein) compared with carbohydrate alone (1.2 g·kg −1 ·h ⁻ 1 ) following a 2-h recovery period [90].”
InfluentialGoldstein, E. R., Stout, J. R., Wells, A. J., Antonio, J., Vasenina, E., & Fukuda, D. H. (2023) · Journal of the International Society of Sports Nutrition · doi:10.1080/15502783.2023.2178858 · Cited by 16
Self-citation
Metadata
- Authors
- Goldstein, E., Stout, J., Starling-Smith, T., & Fukuda, D.
- Venue
- Journal of Exercise and Nutrition
- Publisher
- Pinnacle Science LC
- Published
- 2022-05-19
- Volume
- 5
- Issue
- 2
- ISSN
- 2640-2572
- Cited by
- 1
- References
- 12
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